Ruud air conditioner runs continuously and struggles to reach set temperature, even in moderate weather.

Safety first: Turn off power before cleaning coils or accessing ductwork.

• Step 1 – Clean filters and coils: Replace filters and clean both evaporator and condenser coils as per manufacturer instructions.
• Step 2 – Check duct leaks: Inspect accessible ducts for disconnected joints or large leaks. Seal with mastic or UL-181 foil tape.
• Step 3 – Verify thermostat calibration: Compare thermostat reading to a reliable thermometer. Adjust or replace thermostat if significantly inaccurate.
• Step 4 – Technician diagnostics: If performance remains poor, a technician should check refrigerant charge, compressor efficiency, and TXV operation.